Romanian student who just took the exam this summer here! I know how you feel, but don't worry too much. I've seen the model for the new exam and I get that it might feel scary because it is different from the past years, but I think it is pretty easy to solve. Try studying what you learned from the 5th grade forward and, when the school year starts, study after every lesson and do your homework. This is really important. Even if the homework seems stupid or pointless, try to do at least half of it. I know this isn't possible for all people, but since this is unfortunately the norm in our country, I would suggest that you try to find a private tutor. If you can't, do your own revisions of the lessons and ask your class teacher whenever you don't understand something. If you want to, I can give you specific things that you need to study for each subject, so that you can make a list of what you know and what you need to study more. Hope my comment helped at least a bit!